<template>
   <header class="header">
            <!-- 头部的第一行 -->
            <div class="top">
                <div class="container">
                    <div class="loginList">
                        <p>尚品汇欢迎您！</p>
                        <p v-if="$store.state.user.userInfo.name">
                            <a href="javascript:;">{{$store.state.user.userInfo.name}}</a>
                            <a href="javascript:;" class="register" @click="logout">退出登录</a>
                        </p>
                        <p v-else>
                            <span>请</span>
                            <router-link to="/login">登录</router-link>
                            <router-link to="/register" class="register">免费注册</router-link>
                        </p>
                    </div>
                    <div class="typeList">
                        <router-link to="/center">我的订单</router-link>
                        <router-link to="/shopCart">我的购物车</router-link>
                        <router-link to="/home">我的尚品汇</router-link>
                        <a href="###">尚品汇会员</a>
                        <a href="###">企业采购</a>
                        <a href="###">关注尚品汇</a>
                        <a href="###">合作招商</a>
                        <a href="###">商家后台</a>
                    </div>
                </div>
            </div>
            <!--头部第二行 搜索区域-->
            <div class="bottom">
                <h1 class="logoArea">
                    <router-link class="logo" title="尚品汇" to="/home" >
                        <img src="./images/logo.png" alt="">
                    </router-link>
                </h1>
                <div class="searchArea">
                    <form action="###" class="searchForm">
                                                                                        <!-- 输入框的值双向绑定 -->
                        <input type="text" id="autocomplete" class="input-error input-xxlarge" v-model="keyword"/>
                        <button class="sui-btn btn-xlarge btn-danger" @click="btnSearch"  type="button" >搜索</button>
                    </form>
                </div>
            </div>
        </header>
</template>

<script>
import {mapState} from 'vuex'
export default {
   name:'Header',
   data(){
      return {
           keyword:''//输入框的值存储在这里，
      }
   },
   computed:{
     ...mapState('user',['userInfo'])
   },
   mounted(){
        this.$bus.$on("remove-keyword",()=>{
             this.keyword = '';//清空搜索框的数据
        })
    },
    beforeDestroy(){
        //在组件销毁之前，一定要先清除之前在事件总线上的事件
        this.$bus.$off('remove-keyword');
    },
    methods:{
      btnSearch(){
           // this.$router.push('/search') //编程式路由导航会出现重复点击报错的情况，在router组件中已经解决

        //url地址栏拼接搜索框的内容
        // 1.方案一: 可以使用location.search获取参数部分 ?key=value&key=value
        // 2.路由获取参数
           let {query} = this.$route;//字符串在url地址上拼接时候用
           this.$router.push({
                name:'search',
                query:{
                    ...query,//字符串在url地址上拼接时候用
                    //路由跳转时，如果参数没有值是undefined的时候，路由会自动过滤掉undefined
                    keyword:this.keyword || undefined
                }
           })
        },
        //退出登录
        async logout(){
            try {
                await  this.$store.dispatch('user/userLogout')
                 this.$router.push('/')
            } catch (error) {
                  alert('退出登录失败' + error.message)
            }
        }
    },
    
}
</script>

<style lang="less" scoped>
    .header {
        &>.top {
            background-color: #eaeaea;
            height: 30px;
            line-height: 30px;

            .container {
                width: 1200px;
                margin: 0 auto;
                overflow: hidden;

                .loginList {
                    float: left;

                    p {
                        float: left;
                        margin-right: 10px;

                        .register {
                            border-left: 1px solid #b3aeae;
                            padding: 0 5px;
                            margin-left: 5px;
                        }
                    }
                }

                .typeList {
                    float: right;

                    a {
                        padding: 0 10px;

                        &+a {
                            border-left: 1px solid #b3aeae;
                        }
                    }

                }

            }
        }

        &>.bottom {
            width: 1200px;
            margin: 0 auto;
            overflow: hidden;

            .logoArea {
                float: left;

                .logo {
                    img {
                        width: 175px;
                        margin: 25px 45px;
                    }
                }
            }

            .searchArea {
                float: right;
                margin-top: 35px;

                .searchForm {
                    overflow: hidden;

                    input {
                        box-sizing: border-box;
                        width: 490px;
                        height: 32px;
                        padding: 0px 4px;
                        border: 2px solid #ea4a36;
                        float: left;

                        &:focus {
                            outline: none;
                        }
                    }

                    button {
                        height: 32px;
                        width: 68px;
                        background-color: #ea4a36;
                        border: none;
                        color: #fff;
                        float: left;
                        cursor: pointer;

                        &:focus {
                            outline: none;
                        }
                    }
                }
            }
        }
    }
</style>